Bought this for 2 chewy furballs.(one likes to chew on the corners of anything plastic/laminated, the other likes to chew ELECTRICAL cords. Neither will take even the slightest interest in this thing. Tried with and without bell, tried catnip that came with it, tried my own catnip and even tried treats inside. Cats completely ignored this.That said, this was packaged well, and had quick delivery. Natural rubber smell is a bit strong, but washes out. Every bit as durable as touted. Only complaintSee full review